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2*(x-4) = x-(7/2) // - x-(7/2)
2*(x-4)-x+7/2 = 0
(2^2*(x-4))/2+(2*(-x))/2+7/2 = 0
2^2*(x-4)+2*(-x)+7 = 0
2*x-16+7 = 0
2*x-9 = 0
(2*x-9)/2 = 0
(2*x-9)/2 = 0 // * 2
2*x-9 = 0
2*x-9 = 0 // + 9
2*x = 9 // : 2
x = 9/2
x = 9/2
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